Second,the barycentric coordinates were separated from the matrixes with proper simplifications.Then the motions of components can be linked linearly with its barycentric coordinates.

• 其次构造并合理简化影响系数矩阵,将质心坐标从矩阵中分离出来,则构件的运动可以唯一地用其自身的质心坐标表示。